[PATCH] Fix three bugs in loop unswitching related to trivial unswitching and the threshold parameter

[Mark Heffernan]

Thanks for fixing this.  This certainly seems saner than what is there now.  Some clarifying comments about MaxSize might be good.  Superficially it looks like some global budget because it is a pass level value and gets decremented per loop, but in reality all the budget gets returned when the pass is done with a loop and all of it's clones.


http://reviews.llvm.org/D10376

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